LM6511 180 ns 3V Comparator General Description Features The LM6511 voltage comparator is ideal for analog-digital interface circuitry when only a +3V or +3.3V supply is available. The open-collector output permits signal compatibility with a wide variety of digital families: +5V CMOS, +3V CMOS, TTL and so on. Supply voltage may range from 2.7V to 36V between supply voltage leads. The LM6511 operates with little power consumption (Pdiss < 9.45 mW at V+ = +2.7V and V− = 0V). This voltage comparator offers many features that are available in traditional sub-microsecond comparators: output sync strobe, inputs and output may be isolated from system ground, and wire-ORing. Also, the LM6511 uses the industry-standard, single comparator pinout configuration. (Typical unless otherwise noted) n Operates at +2.7V, +3V, +3.3V, +5V n Low Power consumption < 9.45 mW @ V+ = 2.7V (max) n Fast Response Time of 180 ns Applications n Portable Equipment n Cellular Phones n Digital Level Shifting Connection Diagram 8-Pin SO DS011888-1 Ordering Information Package 8-Pin Small Outline © 1999 National Semiconductor Corporation DS011888 Industrial Temperature Range NSC Package −40˚C to +85˚C Drawing LM6511IM M08A www.national.com LM6511 180 ns 3V Comparator June 1999 Absolute Maximum Ratings (Note 1) Power Dissipation Output Short Circuit Duration Junction Temperature ESD Rating (C = +100 pF, R = 1.5 kΩ) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Output to Negative Supply Voltage Ground to Negative Supply Voltage Differential Input Voltage Input Voltage Storage Temperature Range Soldering Information: SO Package (Vapor Phase in 60 sec) SO Package (Infrared in 15 sec) −0.3 to +36V 50V 30V ± 30V (Note 2) −65˚C to +150˚C 500 mW 10s 150˚C 300V Operating Ratings (Note 1) Supply Voltage Temperature Range Thermal Resistance (θJA) SO Package 2.5V to 30V −40˚C ≤ TJ ≤ +85˚C 170˚C/W 215˚C 220˚C DC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C. Boldface limits apply at the temperature extremes. V+ = 2.7V, V− = 0V, 50Ω ≤ RL ≤ 50kΩ, and IL = 1.0 mA unless otherwise specified Symbol Parameter Conditions Typical LM6511I Limit RS ≤ 50 kΩ Offset Voltage VOS 1.5 (Note 3) IB Input Bias Current 38 5 mV 8 max 130 200 IOS Input Offset Current IS RS ≤ 50 kΩ Units (Limits) nA max 1.5 20 Positive Supply Current 2.7 3.5 Negative Supply Current 1.5 2.0 0.23 0.4 V 0.4 max (Note 3) 50 5 mA max 2.5 VSAT VIN ≤ 10 mV ISINK = 8 mA Saturation Voltage AV Large Signal Voltage Gain CMRR Common Mode Rejection Ratio ISTROBE Strobe ON Current VIN Input Voltage Range ∆VOUT = 2V 40 V/mV 72 (Note 5) VIN ≥ 10 mV, VOUT = 35V, ISTROBE = 3 mA Output Leakage Current dB 2.0 5.0 mA max 0.50 V min V+ − 1.25 V max 0.2 nA max AC Electrical Characteristics Unless otherwise specified, all limits guaranteed for TJ = 25˚C. Boldface limits apply at the temperature extremes. V+ = 2.7V, V− = 0V, 50Ω ≤ RL ≤ 50kΩ, and IL = 1.0 mA unless otherwise specified Symbol Parameter Conditions Typical LM6511I Limit TR Response Time (Note 4) 180 Units (Limits) ns Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating ratings indicate conditions the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Note 2: The positive input voltage limit is 30V above the negative supply voltage. The negative input voltage limit is equal to the negative supply voltage or 30V below the positive supply voltage, whichever is less. Note 3: The offset voltage and offset current limits are the maximum values required to drive the output within a volt of either supply with a 1 mA load. Therefore, these parameters define an error band and take into account the worst-case effects of voltage gain and input impedance. Note 4: This specification is for a 100 mV input step with a 25 mV overdrive. Note 5: This specification gives the range of current which must be drawn from the strobe pin to ensure the output is properly disabled. Do not short the strobe pin to ground; it should be current driven at 3 mA to 5 mA. www.national.com 2 Schematic Diagram DS011888-5 LM6511 Typical Performance Characteristics Input Bias Current VS = 3V unless otherwise noted Input Offset Current Input Current vs Input Voltage DS011888-9 DS011888-8 DS011888-10 3 www.national.com LM6511 Typical Performance Characteristics Common Mode Limits Transfer Function Output Saturation Voltage DS011888-12 DS011888-11 Output Current Limiting VS = 3V unless otherwise noted (Continued) Supply Current vs Temperature Output Leakage Current DS011888-16 DS011888-14 DS011888-15 Propagation Delay vs Overdrive DS011888-3 www.national.com DS011888-13 4 Typical Application Universal Logic Level Shifter DS011888-4 Notes: Because of the very wide operating and output voltage range, the LM6511 may be used to shift logic levels from 3V to TTL or CMOS to the other way around. By biasing the input to 1⁄2 of the input logic supply (VA), this assures that this input remains within the input voltage range. The pull-up resistor should go to the output logic supply (VB). 5 www.national.com Physical Dimensions inches (millimeters) unless otherwise noted 8-Pin Small Outline Package (M) Order Number LM6511IM Package Number M08A www.national.com 6 LM6511 180 ns 3V Comparator Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Pin Molded Dual-In-Line Package (N) Order Number LM6511IN Package Number N08E LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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